52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* mpf_cmp_d -- compare mpf and double.
|
|
|
|
Copyright 2001, 2003 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The GNU MP Library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include "config.h"
|
|
|
|
#if HAVE_FLOAT_H
|
|
#include <float.h> /* for DBL_MAX */
|
|
#endif
|
|
|
|
#include "gmp.h"
|
|
#include "gmp-impl.h"
|
|
|
|
int
|
|
mpf_cmp_d (mpf_srcptr f, double d)
|
|
{
|
|
mp_limb_t darray[LIMBS_PER_DOUBLE];
|
|
mpf_t df;
|
|
|
|
/* d=NaN has no sensible return value, so raise an exception.
|
|
d=Inf or -Inf is always bigger than z. */
|
|
DOUBLE_NAN_INF_ACTION (d,
|
|
__gmp_invalid_operation (),
|
|
return (d < 0.0 ? 1 : -1));
|
|
|
|
if (d == 0.0)
|
|
return SIZ(f);
|
|
|
|
PTR(df) = darray;
|
|
SIZ(df) = (d >= 0.0 ? LIMBS_PER_DOUBLE : -LIMBS_PER_DOUBLE);
|
|
EXP(df) = __gmp_extract_double (darray, ABS(d));
|
|
|
|
return mpf_cmp (f, df);
|
|
}
|